A car is travelling with the speed of 90 km/hr and another car is with the speed of 20 m/s in opposite direction. calculate their relative velocity.
Answers
Answer:
5m/s
Explanation:
Va = 90km/hr = 25m/s
Vb = 20m/s
Vab = 25-20 = 5m/s
Answer:
First, since there are 60 min. in an hr, divide 90 km/hr by 60 to get km/min. To make the division easy, drop the zero off both 90 & 60 (essentially dividing both by 10). Now you have 9/6 which is 1.5 km/min.
Next: 20 sec. is 1/3 of a minute so in 1/3 min you travel 1/3 of 1.5, or 0.5 km in 20 seconds.
Conveniently these values lended themselves well to easy arithmetic. Obviously that is not always the case. However, if you just want an approximate answer, you can do the math in your head by rounding the beginning numbers to convenient numbers that are close to their value
Explanation:
A car is running at a speed of 90 km per hour. What distance will it cover in 20 seconds?
this is the question of the answer try to understand from it